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Tesla fans appear to have discovered the next iteration of the Model S: An as-yet unannounced, more powerful version that sports a 100 kilowatt-hour battery.

The most advanced Model S you can buy today comes with a 90 kWh battery and can grant its driver a driving range of nearly 290 miles (466km) . A bigger battery would mean extending that range even more - potentially exceeding 300 miles on a single charge - or give the car greater performance.

The tinkerer who unearthed evidence of the new car, Jason Hughes, found mention of a mysterious "P100D" buried in the software that runs Tesla's cars. Considering that the top-of-the-line Model S is named the P90D, where the "90" is a reference to the battery capacity, Hughes and other Tesla enthusiasts reason that a P100D would improve on existing batteries by 10 kWh.